流鼻血时,低头可引起头部充血不适。有很多人流鼻血时习惯把头仰起,甚至将鼻血咽下去再吸收,这也不正确。因为仰头会使血液顺重力作用流到咽喉部,当血量过多、过急时,容易呛入气管及肺内,造成呼吸道梗阻;如果鼻血经咽喉进入胃内,就会刺激 Nosebleeds, head bowel can cause congestion congestion. There are many people nosebleeds used to head up, or even swallowed nasal discharge, which is not correct. Because the upward head will make the blood flow to the throat along the gravity effect, when the blood volume too much, too fast, easy to choke into the trachea and lungs, resulting in respiratory obstruction; if the nasal blood through the throat into the stomach, it will stimulate